I purchased these binoculars concert Stromae where I thought I would be sitting very, very far from the scene with my 9 year old son. Finally, we managed to get closer but still too far away for my little piece sees something ... With these binoculars, we were almost at a private concert, concert even our neighbors were conquered. Vision on top, autofocus on top, certainly they are heavy and bulky but no free !!! This is the diameter and expansion I wanted. Super fast delivery. Suitable for the whole family.